PDCA consists of the initials of English words Plan, Do, Check and Act. PDCA is a cycle of quality management. The four English letters of PDCA and their meanings in PDCA cycle are as follows.

P (plan): plan, determine the policy objectives and determine the activity plan. D (do): carry out, do it on the spot, and realize the contents in the plan. C (inspection): check and summarize the results of the implementation plan, pay attention to the effect and find problems.

A (Action): Action, which deals with the summarized inspection results, affirms the successful experience, and appropriately promotes and standardizes it; Summarize the lessons of failure, avoid recurrence, and put the unresolved problems into the next PDCA cycle.

Application stage

1, planning stage. Through market research and user visits, we should understand the user's requirements for product quality and determine the quality policy, quality objectives and quality plan. Including the investigation and analysis of the current situation, determining the main reasons and making plans.

2. Design and implementation stage. Implement the content specified in the previous stage. Conduct product design, trial production, testing and personnel training before the implementation of the plan according to quality standards.

3. Inspection stage. Mainly during or after the implementation of the plan, check the implementation to see if the expected results and effects of the plan are achieved.

4. Processing stage. Mainly according to the inspection results, take corresponding measures. Consolidate the achievements, incorporate successful experiences into the standards as far as possible, standardize them, and transfer the remaining problems to the next PDCA cycle to solve.